Roger de Mortimer
Roger was born in 1231.  He died at the age of 51 on October 27th, 1282.

 Maud de Braose
Maud was born in 1221.  She died before March 20th, 1300.

 Edmund de Mortimer
Edmund was born in 1255.  He died at the age of 49 on July 17th, 1304.